Housing for electric heater



FIG. 1 is a front perspective view of a housing for an electric heater showing the new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front side elevation view thereof; and,

FIG. 4 is a left side elevation view thereof, the right side being a mirror image thereof.

The bottom and rear form no part of the claimed design. The subject matter shown in broken lines forms no part of the claimed design.

The outermost broken line around the grill area immediately adjacent the shaded area represents the bounds of the claimed design but forms no part thereof. 

The ornamental design for a housing for an electric heater, as shown and described. 